| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2007 David Smith (catfish.man@gmail.com) |
| * Copyright (C) 2003-2013, Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef RenderBlockFlow_h |
| #define RenderBlockFlow_h |
| |
| #include "RenderBlock.h" |
| #include "RenderLineBoxList.h" |
| #include "SimpleLineLayout.h" |
| |
| namespace WebCore { |
| |
| class LineBreaker; |
| class RenderNamedFlowFragment; |
| struct FloatWithRect; |
| |
| class RenderBlockFlow : public RenderBlock { |
| public: |
| RenderBlockFlow(Element&, PassRef<RenderStyle>); |
| RenderBlockFlow(Document&, PassRef<RenderStyle>); |
| virtual ~RenderBlockFlow(); |
| |
| virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) OVERRIDE; |
| |
| protected: |
| virtual void insertedIntoTree() OVERRIDE; |
| virtual void willBeDestroyed() OVERRIDE; |
| |
| // This method is called at the start of layout to wipe away all of the floats in our floating objects list. It also |
| // repopulates the list with any floats that intrude from previous siblings or parents. Floats that were added by |
| // descendants are gone when this call completes and will get added back later on after the children have gotten |
| // a relayout. |
| void clearFloats(); |
| |
| // RenderBlockFlow always contains either lines or paragraphs. When the children are all blocks (e.g. paragraphs), we call layoutBlockChildren. |
| // When the children are are all inline (e.g., lines), we call layoutInlineChildren. |
| void layoutBlockChildren(bool relayoutChildren, LayoutUnit& maxFloatLogicalBottom); |
| void layoutInlineChildren(bool relayoutChildren, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom); |
| |
| // RenderBlockFlows override these methods, since they are the only class that supports margin collapsing. |
| virtual LayoutUnit collapsedMarginBefore() const OVERRIDE FINAL { return maxPositiveMarginBefore() - maxNegativeMarginBefore(); } |
| virtual LayoutUnit collapsedMarginAfter() const OVERRIDE FINAL { return maxPositiveMarginAfter() - maxNegativeMarginAfter(); } |
| |
| virtual void dirtyLinesFromChangedChild(RenderObject* child) OVERRIDE FINAL { lineBoxes().dirtyLinesFromChangedChild(this, child); } |
| virtual void updateLogicalHeight() OVERRIDE; |
| |
| public: |
| class MarginValues { |
| public: |
| MarginValues(LayoutUnit beforePos, LayoutUnit beforeNeg, LayoutUnit afterPos, LayoutUnit afterNeg) |
| : m_positiveMarginBefore(beforePos) |
| , m_negativeMarginBefore(beforeNeg) |
| , m_positiveMarginAfter(afterPos) |
| , m_negativeMarginAfter(afterNeg) |
| { } |
| |
| LayoutUnit positiveMarginBefore() const { return m_positiveMarginBefore; } |
| LayoutUnit negativeMarginBefore() const { return m_negativeMarginBefore; } |
| LayoutUnit positiveMarginAfter() const { return m_positiveMarginAfter; } |
| LayoutUnit negativeMarginAfter() const { return m_negativeMarginAfter; } |
| |
| void setPositiveMarginBefore(LayoutUnit pos) { m_positiveMarginBefore = pos; } |
| void setNegativeMarginBefore(LayoutUnit neg) { m_negativeMarginBefore = neg; } |
| void setPositiveMarginAfter(LayoutUnit pos) { m_positiveMarginAfter = pos; } |
| void setNegativeMarginAfter(LayoutUnit neg) { m_negativeMarginAfter = neg; } |
| |
| private: |
| LayoutUnit m_positiveMarginBefore; |
| LayoutUnit m_negativeMarginBefore; |
| LayoutUnit m_positiveMarginAfter; |
| LayoutUnit m_negativeMarginAfter; |
| }; |
| MarginValues marginValuesForChild(RenderBox& child) const; |
| |
| // Allocated only when some of these fields have non-default values |
| struct RenderBlockFlowRareData { |
| WTF_MAKE_NONCOPYABLE(RenderBlockFlowRareData); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| RenderBlockFlowRareData(const RenderBlockFlow& block) |
| : m_margins(positiveMarginBeforeDefault(block), negativeMarginBeforeDefault(block), positiveMarginAfterDefault(block), negativeMarginAfterDefault(block)) |
| , m_lineBreakToAvoidWidow(-1) |
| , m_lineGridBox(nullptr) |
| , m_renderNamedFlowFragment(nullptr) |
| , m_discardMarginBefore(false) |
| , m_discardMarginAfter(false) |
| , m_didBreakAtLineToAvoidWidow(false) |
| { |
| } |
| |
| static LayoutUnit positiveMarginBeforeDefault(const RenderBlock& block) |
| { |
| return std::max<LayoutUnit>(block.marginBefore(), 0); |
| } |
| static LayoutUnit negativeMarginBeforeDefault(const RenderBlock& block) |
| { |
| return std::max<LayoutUnit>(-block.marginBefore(), 0); |
| } |
| static LayoutUnit positiveMarginAfterDefault(const RenderBlock& block) |
| { |
| return std::max<LayoutUnit>(block.marginAfter(), 0); |
| } |
| static LayoutUnit negativeMarginAfterDefault(const RenderBlock& block) |
| { |
| return std::max<LayoutUnit>(-block.marginAfter(), 0); |
| } |
| |
| MarginValues m_margins; |
| int m_lineBreakToAvoidWidow; |
| RootInlineBox* m_lineGridBox; |
| RenderNamedFlowFragment* m_renderNamedFlowFragment; |
| |
| bool m_discardMarginBefore : 1; |
| bool m_discardMarginAfter : 1; |
| bool m_didBreakAtLineToAvoidWidow : 1; |
| }; |
| |
| class MarginInfo { |
| // Collapsing flags for whether we can collapse our margins with our children's margins. |
| bool m_canCollapseWithChildren : 1; |
| bool m_canCollapseMarginBeforeWithChildren : 1; |
| bool m_canCollapseMarginAfterWithChildren : 1; |
| |
| // Whether or not we are a quirky container, i.e., do we collapse away top and bottom |
| // margins in our container. Table cells and the body are the common examples. We |
| // also have a custom style property for Safari RSS to deal with TypePad blog articles. |
| bool m_quirkContainer : 1; |
| |
| // This flag tracks whether we are still looking at child margins that can all collapse together at the beginning of a block. |
| // They may or may not collapse with the top margin of the block (|m_canCollapseTopWithChildren| tells us that), but they will |
| // always be collapsing with one another. This variable can remain set to true through multiple iterations |
| // as long as we keep encountering self-collapsing blocks. |
| bool m_atBeforeSideOfBlock : 1; |
| |
| // This flag is set when we know we're examining bottom margins and we know we're at the bottom of the block. |
| bool m_atAfterSideOfBlock : 1; |
| |
| // These variables are used to detect quirky margins that we need to collapse away (in table cells |
| // and in the body element). |
| bool m_hasMarginBeforeQuirk : 1; |
| bool m_hasMarginAfterQuirk : 1; |
| bool m_determinedMarginBeforeQuirk : 1; |
| |
| bool m_discardMargin : 1; |
| |
| // These flags track the previous maximal positive and negative margins. |
| LayoutUnit m_positiveMargin; |
| LayoutUnit m_negativeMargin; |
| |
| public: |
| MarginInfo(RenderBlockFlow&, LayoutUnit beforeBorderPadding, LayoutUnit afterBorderPadding); |
| |
| void setAtBeforeSideOfBlock(bool b) { m_atBeforeSideOfBlock = b; } |
| void setAtAfterSideOfBlock(bool b) { m_atAfterSideOfBlock = b; } |
| void clearMargin() |
| { |
| m_positiveMargin = 0; |
| m_negativeMargin = 0; |
| } |
| void setHasMarginBeforeQuirk(bool b) { m_hasMarginBeforeQuirk = b; } |
| void setHasMarginAfterQuirk(bool b) { m_hasMarginAfterQuirk = b; } |
| void setDeterminedMarginBeforeQuirk(bool b) { m_determinedMarginBeforeQuirk = b; } |
| void setPositiveMargin(LayoutUnit p) { ASSERT(!m_discardMargin); m_positiveMargin = p; } |
| void setNegativeMargin(LayoutUnit n) { ASSERT(!m_discardMargin); m_negativeMargin = n; } |
| void setPositiveMarginIfLarger(LayoutUnit p) |
| { |
| ASSERT(!m_discardMargin); |
| if (p > m_positiveMargin) |
| m_positiveMargin = p; |
| } |
| void setNegativeMarginIfLarger(LayoutUnit n) |
| { |
| ASSERT(!m_discardMargin); |
| if (n > m_negativeMargin) |
| m_negativeMargin = n; |
| } |
| |
| void setMargin(LayoutUnit p, LayoutUnit n) { ASSERT(!m_discardMargin); m_positiveMargin = p; m_negativeMargin = n; } |
| void setCanCollapseMarginAfterWithChildren(bool collapse) { m_canCollapseMarginAfterWithChildren = collapse; } |
| void setDiscardMargin(bool value) { m_discardMargin = value; } |
| |
| bool atBeforeSideOfBlock() const { return m_atBeforeSideOfBlock; } |
| bool canCollapseWithMarginBefore() const { return m_atBeforeSideOfBlock && m_canCollapseMarginBeforeWithChildren; } |
| bool canCollapseWithMarginAfter() const { return m_atAfterSideOfBlock && m_canCollapseMarginAfterWithChildren; } |
| bool canCollapseMarginBeforeWithChildren() const { return m_canCollapseMarginBeforeWithChildren; } |
| bool canCollapseMarginAfterWithChildren() const { return m_canCollapseMarginAfterWithChildren; } |
| bool quirkContainer() const { return m_quirkContainer; } |
| bool determinedMarginBeforeQuirk() const { return m_determinedMarginBeforeQuirk; } |
| bool hasMarginBeforeQuirk() const { return m_hasMarginBeforeQuirk; } |
| bool hasMarginAfterQuirk() const { return m_hasMarginAfterQuirk; } |
| LayoutUnit positiveMargin() const { return m_positiveMargin; } |
| LayoutUnit negativeMargin() const { return m_negativeMargin; } |
| bool discardMargin() const { return m_discardMargin; } |
| LayoutUnit margin() const { return m_positiveMargin - m_negativeMargin; } |
| }; |
| |
| void layoutBlockChild(RenderBox& child, MarginInfo&, LayoutUnit& previousFloatLogicalBottom, LayoutUnit& maxFloatLogicalBottom); |
| void adjustPositionedBlock(RenderBox& child, const MarginInfo&); |
| void adjustFloatingBlock(const MarginInfo&); |
| |
| void setStaticInlinePositionForChild(RenderBox& child, LayoutUnit blockOffset, LayoutUnit inlinePosition); |
| void updateStaticInlinePositionForChild(RenderBox& child, LayoutUnit logicalTop); |
| |
| LayoutUnit collapseMargins(RenderBox& child, MarginInfo&); |
| LayoutUnit clearFloatsIfNeeded(RenderBox& child, MarginInfo&, LayoutUnit oldTopPosMargin, LayoutUnit oldTopNegMargin, LayoutUnit yPos); |
| LayoutUnit estimateLogicalTopPosition(RenderBox& child, const MarginInfo&, LayoutUnit& estimateWithoutPagination); |
| void marginBeforeEstimateForChild(RenderBox&, LayoutUnit&, LayoutUnit&, bool&) const; |
| void handleAfterSideOfBlock(LayoutUnit top, LayoutUnit bottom, MarginInfo&); |
| void setCollapsedBottomMargin(const MarginInfo&); |
| |
| bool shouldBreakAtLineToAvoidWidow() const { return m_rareData && m_rareData->m_lineBreakToAvoidWidow >= 0; } |
| void clearShouldBreakAtLineToAvoidWidow() const; |
| int lineBreakToAvoidWidow() const { return m_rareData ? m_rareData->m_lineBreakToAvoidWidow : -1; } |
| void setBreakAtLineToAvoidWidow(int); |
| void clearDidBreakAtLineToAvoidWidow(); |
| void setDidBreakAtLineToAvoidWidow(); |
| bool didBreakAtLineToAvoidWidow() const { return m_rareData && m_rareData->m_didBreakAtLineToAvoidWidow; } |
| bool relayoutToAvoidWidows(LayoutStateMaintainer&); |
| |
| virtual bool canHaveGeneratedChildren() const OVERRIDE; |
| |
| RootInlineBox* lineGridBox() const { return m_rareData ? m_rareData->m_lineGridBox : 0; } |
| void setLineGridBox(RootInlineBox* box) |
| { |
| if (!m_rareData) |
| m_rareData = adoptPtr(new RenderBlockFlowRareData(*this)); |
| delete m_rareData->m_lineGridBox; |
| m_rareData->m_lineGridBox = box; |
| } |
| void layoutLineGridBox(); |
| |
| RenderNamedFlowFragment* renderNamedFlowFragment() const { return m_rareData ? m_rareData->m_renderNamedFlowFragment : 0; } |
| void setRenderNamedFlowFragment(RenderNamedFlowFragment*); |
| |
| bool containsFloats() const OVERRIDE { return m_floatingObjects && !m_floatingObjects->set().isEmpty(); } |
| bool containsFloat(RenderBox&) const; |
| |
| virtual void deleteLines() OVERRIDE; |
| virtual void computeOverflow(LayoutUnit oldClientAfterEdge, bool recomputeFloats = false) OVERRIDE; |
| |
| void removeFloatingObjects(); |
| void markAllDescendantsWithFloatsForLayout(RenderBox* floatToRemove = nullptr, bool inLayout = true); |
| void markSiblingsWithFloatsForLayout(RenderBox* floatToRemove = nullptr); |
| |
| LayoutUnit logicalTopForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->y() : floatingObject->x(); } |
| LayoutUnit logicalBottomForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->maxY() : floatingObject->maxX(); } |
| LayoutUnit logicalLeftForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->x() : floatingObject->y(); } |
| LayoutUnit logicalRightForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->maxX() : floatingObject->maxY(); } |
| LayoutUnit logicalWidthForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->width() : floatingObject->height(); } |
| LayoutUnit logicalHeightForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->height() : floatingObject->width(); } |
| LayoutSize logicalSizeForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? LayoutSize(floatingObject->width(), floatingObject->height()) : LayoutSize(floatingObject->height(), floatingObject->width()); } |
| |
| int pixelSnappedLogicalTopForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedY() : floatingObject->frameRect().pixelSnappedX(); } |
| int pixelSnappedLogicalBottomForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedMaxY() : floatingObject->frameRect().pixelSnappedMaxX(); } |
| int pixelSnappedLogicalLeftForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedX() : floatingObject->frameRect().pixelSnappedY(); } |
| int pixelSnappedLogicalRightForFloat(const FloatingObject* floatingObject) const { return isHorizontalWritingMode() ? floatingObject->frameRect().pixelSnappedMaxX() : floatingObject->frameRect().pixelSnappedMaxY(); } |
| |
| void setLogicalTopForFloat(FloatingObject* floatingObject, LayoutUnit logicalTop) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setY(logicalTop); |
| else |
| floatingObject->setX(logicalTop); |
| } |
| void setLogicalLeftForFloat(FloatingObject* floatingObject, LayoutUnit logicalLeft) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setX(logicalLeft); |
| else |
| floatingObject->setY(logicalLeft); |
| } |
| void setLogicalHeightForFloat(FloatingObject* floatingObject, LayoutUnit logicalHeight) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setHeight(logicalHeight); |
| else |
| floatingObject->setWidth(logicalHeight); |
| } |
| void setLogicalWidthForFloat(FloatingObject* floatingObject, LayoutUnit logicalWidth) |
| { |
| if (isHorizontalWritingMode()) |
| floatingObject->setWidth(logicalWidth); |
| else |
| floatingObject->setHeight(logicalWidth); |
| } |
| |
| LayoutUnit xPositionForFloatIncludingMargin(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->x() + child->renderer().marginLeft() : child->x() + marginBeforeForChild(child->renderer()); } |
| LayoutUnit yPositionForFloatIncludingMargin(const FloatingObject* child) const { return isHorizontalWritingMode() ? child->y() + marginBeforeForChild(child->renderer()) : child->y() + child->renderer().marginTop(); } |
| |
| LayoutPoint flipFloatForWritingModeForChild(const FloatingObject*, const LayoutPoint&) const; |
| |
| RenderLineBoxList& lineBoxes() { return m_lineBoxes; } |
| const RenderLineBoxList& lineBoxes() const { return m_lineBoxes; } |
| |
| InlineFlowBox* firstLineBox() const { return m_lineBoxes.firstLineBox(); } |
| InlineFlowBox* lastLineBox() const { return m_lineBoxes.lastLineBox(); } |
| |
| RootInlineBox* firstRootBox() const { return static_cast<RootInlineBox*>(firstLineBox()); } |
| RootInlineBox* lastRootBox() const { return static_cast<RootInlineBox*>(lastLineBox()); } |
| |
| virtual bool hasLines() const OVERRIDE FINAL; |
| |
| // Helper methods for computing line counts and heights for line counts. |
| RootInlineBox* lineAtIndex(int) const; |
| int lineCount(const RootInlineBox* = nullptr, bool* = nullptr) const; |
| int heightForLineCount(int); |
| void clearTruncation(); |
| |
| void setHasMarkupTruncation(bool b) { m_hasMarkupTruncation = b; } |
| bool hasMarkupTruncation() const { return m_hasMarkupTruncation; } |
| |
| bool containsNonZeroBidiLevel() const; |
| |
| const SimpleLineLayout::Layout* simpleLineLayout() const { return m_simpleLineLayout.get(); } |
| void deleteLineBoxesBeforeSimpleLineLayout(); |
| void ensureLineBoxes(); |
| |
| #ifndef NDEBUG |
| virtual void showLineTreeAndMark(const InlineBox* = nullptr, const char* = nullptr, const InlineBox* = nullptr, const char* = nullptr, const RenderObject* = nullptr) const OVERRIDE; |
| #endif |
| |
| // Returns the logicalOffset at the top of the next page. If the offset passed in is already at the top of the current page, |
| // then nextPageLogicalTop with ExcludePageBoundary will still move to the top of the next page. nextPageLogicalTop with |
| // IncludePageBoundary set will not. |
| // |
| // For a page height of 800px, the first rule will return 800 if the value passed in is 0. The second rule will simply return 0. |
| enum PageBoundaryRule { ExcludePageBoundary, IncludePageBoundary }; |
| LayoutUnit nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundaryRule = ExcludePageBoundary) const; |
| LayoutUnit pageLogicalTopForOffset(LayoutUnit offset) const; |
| LayoutUnit pageLogicalHeightForOffset(LayoutUnit offset) const; |
| LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit offset, PageBoundaryRule = IncludePageBoundary) const; |
| bool hasNextPage(LayoutUnit logicalOffset, PageBoundaryRule = ExcludePageBoundary) const; |
| |
| protected: |
| // A page break is required at some offset due to space shortage in the current fragmentainer. |
| void setPageBreak(LayoutUnit offset, LayoutUnit spaceShortage); |
| |
| // Update minimum page height required to avoid fragmentation where it shouldn't occur (inside |
| // unbreakable content, between orphans and widows, etc.). This will be used as a hint to the |
| // column balancer to help set a good minimum column height. |
| void updateMinimumPageHeight(LayoutUnit offset, LayoutUnit minHeight); |
| bool pushToNextPageWithMinimumLogicalHeight(LayoutUnit& adjustment, LayoutUnit logicalOffset, LayoutUnit minimumLogicalHeight) const; |
| |
| // If the child is unsplittable and can't fit on the current page, return the top of the next page/column. |
| LayoutUnit adjustForUnsplittableChild(RenderBox& child, LayoutUnit logicalOffset, bool includeMargins = false); |
| LayoutUnit adjustBlockChildForPagination(LayoutUnit logicalTopAfterClear, LayoutUnit estimateWithoutPagination, RenderBox& child, bool atBeforeSideOfBlock); |
| LayoutUnit applyBeforeBreak(RenderBox& child, LayoutUnit logicalOffset); // If the child has a before break, then return a new yPos that shifts to the top of the next page/column. |
| LayoutUnit applyAfterBreak(RenderBox& child, LayoutUnit logicalOffset, MarginInfo&); // If the child has an after break, then return a new offset that shifts to the top of the next page/column. |
| |
| LayoutUnit maxPositiveMarginBefore() const { return m_rareData ? m_rareData->m_margins.positiveMarginBefore() : RenderBlockFlowRareData::positiveMarginBeforeDefault(*this); } |
| LayoutUnit maxNegativeMarginBefore() const { return m_rareData ? m_rareData->m_margins.negativeMarginBefore() : RenderBlockFlowRareData::negativeMarginBeforeDefault(*this); } |
| LayoutUnit maxPositiveMarginAfter() const { return m_rareData ? m_rareData->m_margins.positiveMarginAfter() : RenderBlockFlowRareData::positiveMarginAfterDefault(*this); } |
| LayoutUnit maxNegativeMarginAfter() const { return m_rareData ? m_rareData->m_margins.negativeMarginAfter() : RenderBlockFlowRareData::negativeMarginAfterDefault(*this); } |
| |
| void initMaxMarginValues() |
| { |
| if (!m_rareData) |
| return; |
| m_rareData->m_margins = MarginValues(RenderBlockFlowRareData::positiveMarginBeforeDefault(*this) , RenderBlockFlowRareData::negativeMarginBeforeDefault(*this), |
| RenderBlockFlowRareData::positiveMarginAfterDefault(*this), RenderBlockFlowRareData::negativeMarginAfterDefault(*this)); |
| m_rareData->m_discardMarginBefore = false; |
| m_rareData->m_discardMarginAfter = false; |
| } |
| |
| void setMaxMarginBeforeValues(LayoutUnit pos, LayoutUnit neg); |
| void setMaxMarginAfterValues(LayoutUnit pos, LayoutUnit neg); |
| |
| void setMustDiscardMarginBefore(bool = true); |
| void setMustDiscardMarginAfter(bool = true); |
| |
| bool mustDiscardMarginBefore() const; |
| bool mustDiscardMarginAfter() const; |
| |
| bool mustDiscardMarginBeforeForChild(const RenderBox&) const; |
| bool mustDiscardMarginAfterForChild(const RenderBox&) const; |
| bool mustSeparateMarginBeforeForChild(const RenderBox&) const; |
| bool mustSeparateMarginAfterForChild(const RenderBox&) const; |
| |
| virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) OVERRIDE; |
| virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE; |
| |
| void createFloatingObjects(); |
| |
| virtual int firstLineBaseline() const OVERRIDE; |
| virtual int inlineBlockBaseline(LineDirectionMode) const OVERRIDE; |
| |
| private: |
| virtual void paintInlineChildren(PaintInfo&, const LayoutPoint&) OVERRIDE; |
| virtual void paintFloats(PaintInfo&, const LayoutPoint&, bool preservePhase = false) OVERRIDE; |
| |
| virtual void moveAllChildrenIncludingFloatsTo(RenderBlock* toBlock, bool fullRemoveInsert) OVERRIDE; |
| virtual void repaintOverhangingFloats(bool paintAllDescendants) OVERRIDE FINAL; |
| virtual void clipOutFloatingObjects(RenderBlock&, const PaintInfo*, const LayoutPoint&, const LayoutSize&) OVERRIDE; |
| |
| FloatingObject* insertFloatingObject(RenderBox&); |
| void removeFloatingObject(RenderBox&); |
| void removeFloatingObjectsBelow(FloatingObject*, int logicalOffset); |
| LayoutPoint computeLogicalLocationForFloat(const FloatingObject*, LayoutUnit logicalTopOffset) const; |
| |
| // Called from lineWidth, to position the floats added in the last line. |
| // Returns true if and only if it has positioned any floats. |
| bool positionNewFloats(); |
| |
| void newLine(EClear); |
| |
| virtual LayoutUnit logicalRightFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit* heightRemaining, LayoutUnit logicalHeight, ShapeOutsideFloatOffsetMode) const OVERRIDE; |
| virtual LayoutUnit logicalLeftFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit* heightRemaining, LayoutUnit logicalHeight, ShapeOutsideFloatOffsetMode) const OVERRIDE; |
| LayoutUnit lowestFloatLogicalBottom(FloatingObject::Type = FloatingObject::FloatLeftRight) const; |
| LayoutUnit nextFloatLogicalBottomBelow(LayoutUnit, ShapeOutsideFloatOffsetMode = ShapeOutsideFloatMarginBoxOffset) const; |
| |
| LayoutUnit addOverhangingFloats(RenderBlockFlow& child, bool makeChildPaintOtherFloats); |
| bool hasOverhangingFloat(RenderBox&); |
| void addIntrudingFloats(RenderBlockFlow* prev, LayoutUnit xoffset, LayoutUnit yoffset); |
| bool hasOverhangingFloats() { return parent() && !hasColumns() && containsFloats() && lowestFloatLogicalBottom() > logicalHeight(); } |
| LayoutUnit getClearDelta(RenderBox& child, LayoutUnit yPos); |
| |
| virtual bool hitTestFloats(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset) OVERRIDE; |
| virtual bool hitTestInlineChildren(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; |
| |
| void addOverflowFromFloats(); |
| virtual void addOverflowFromInlineChildren(); |
| |
| void fitBorderToLinesIfNeeded(); // Shrink the box in which the border paints if border-fit is set. |
| void adjustForBorderFit(LayoutUnit x, LayoutUnit& left, LayoutUnit& right) const; |
| |
| void markLinesDirtyInBlockRange(LayoutUnit logicalTop, LayoutUnit logicalBottom, RootInlineBox* highest = 0); |
| |
| virtual GapRects inlineSelectionGaps(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const LogicalSelectionOffsetCaches&, const PaintInfo*) OVERRIDE; |
| |
| Position positionForBox(InlineBox*, bool start = true) const; |
| virtual VisiblePosition positionForPointWithInlineChildren(const LayoutPoint& pointInLogicalContents) OVERRIDE; |
| RenderBlockFlowRareData& ensureRareData(); |
| virtual void addFocusRingRectsForInlineChildren(Vector<IntRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject*) OVERRIDE; |
| |
| // FIXME-BLOCKFLOW: These methods have implementations in |
| // RenderBlockLineLayout. They should be moved to the proper header once the |
| // line layout code is separated from RenderBlock and RenderBlockFlow. |
| // START METHODS DEFINED IN RenderBlockLineLayout |
| public: |
| static void appendRunsForObject(BidiRunList<BidiRun>&, int start, int end, RenderObject*, InlineBidiResolver&); |
| RootInlineBox* createAndAppendRootInlineBox(); |
| |
| private: |
| void layoutLineBoxes(bool relayoutChildren, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom); |
| void layoutSimpleLines(LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom); |
| |
| virtual RootInlineBox* createRootInlineBox(); // Subclassed by SVG and Ruby. |
| InlineFlowBox* createLineBoxes(RenderObject*, const LineInfo&, InlineBox* childBox, bool startsNewSegment); |
| RootInlineBox* constructLine(BidiRunList<BidiRun>&, const LineInfo&); |
| void setMarginsForRubyRun(BidiRun*, RenderRubyRun&, RenderObject*, const LineInfo&); |
| void computeInlineDirectionPositionsForLine(RootInlineBox*, const LineInfo&, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&, WordMeasurements&); |
| BidiRun* computeInlineDirectionPositionsForSegment(RootInlineBox*, const LineInfo&, ETextAlign, float& logicalLeft, |
| float& availableLogicalWidth, BidiRun* firstRun, BidiRun* trailingSpaceRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache&, WordMeasurements&); |
| void computeBlockDirectionPositionsForLine(RootInlineBox*, BidiRun*, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&); |
| BidiRun* handleTrailingSpaces(BidiRunList<BidiRun>&, BidiContext*); |
| void appendFloatingObjectToLastLine(FloatingObject*); |
| // Helper function for layoutInlineChildren() |
| RootInlineBox* createLineBoxesFromBidiRuns(BidiRunList<BidiRun>&, const InlineIterator& end, LineInfo&, VerticalPositionCache&, BidiRun* trailingSpaceRun, WordMeasurements&); |
| void layoutRunsAndFloats(LineLayoutState&, bool hasInlineChild); |
| const InlineIterator& restartLayoutRunsAndFloatsInRange(LayoutUnit oldLogicalHeight, LayoutUnit newLogicalHeight, FloatingObject* lastFloatFromPreviousLine, InlineBidiResolver&, const InlineIterator&); |
| void layoutRunsAndFloatsInRange(LineLayoutState&, InlineBidiResolver&, const InlineIterator& cleanLineStart, const BidiStatus& cleanLineBidiStatus, unsigned consecutiveHyphenatedLines); |
| #if ENABLE(CSS_SHAPES) |
| void updateShapeAndSegmentsForCurrentLine(ShapeInsideInfo*&, const LayoutSize&, LineLayoutState&); |
| void updateShapeAndSegmentsForCurrentLineInFlowThread(ShapeInsideInfo*&, LineLayoutState&); |
| bool adjustLogicalLineTopAndLogicalHeightIfNeeded(ShapeInsideInfo*, LayoutUnit, LineLayoutState&, InlineBidiResolver&, FloatingObject*, InlineIterator&, WordMeasurements&); |
| #endif |
| void linkToEndLineIfNeeded(LineLayoutState&); |
| static void repaintDirtyFloats(Vector<FloatWithRect>& floats); |
| void checkFloatsInCleanLine(RootInlineBox*, Vector<FloatWithRect>&, size_t& floatIndex, bool& encounteredNewFloat, bool& dirtiedByFloat); |
| RootInlineBox* determineStartPosition(LineLayoutState&, InlineBidiResolver&); |
| void determineEndPosition(LineLayoutState&, RootInlineBox* startBox, InlineIterator& cleanLineStart, BidiStatus& cleanLineBidiStatus); |
| bool checkPaginationAndFloatsAtEndLine(LineLayoutState&); |
| bool matchedEndLine(LineLayoutState&, const InlineBidiResolver&, const InlineIterator& endLineStart, const BidiStatus& endLineStatus); |
| void deleteEllipsisLineBoxes(); |
| void checkLinesForTextOverflow(); |
| // Positions new floats and also adjust all floats encountered on the line if any of them |
| // have to move to the next page/column. |
| bool positionNewFloatOnLine(FloatingObject* newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo&, LineWidth&); |
| // This function is called to test a line box that has moved in the block direction to see if it has ended up in a new |
| // region/page/column that has a different available line width than the old one. Used to know when you have to dirty a |
| // line, i.e., that it can't be re-used. |
| bool lineWidthForPaginatedLineChanged(RootInlineBox*, LayoutUnit lineDelta, RenderFlowThread*) const; |
| |
| // END METHODS DEFINED IN RenderBlockLineLayout |
| |
| bool namedFlowFragmentNeedsUpdate() const; |
| virtual bool canHaveChildren() const OVERRIDE; |
| |
| public: |
| // FIXME-BLOCKFLOW: These can be made protected again once all callers have been moved here. |
| void adjustLinePositionForPagination(RootInlineBox*, LayoutUnit& deltaOffset, RenderFlowThread*); // Computes a deltaOffset value that put a line at the top of the next page if it doesn't fit on the current page. |
| void updateRegionForLine(RootInlineBox*) const; |
| void createRenderNamedFlowFragmentIfNeeded(); |
| |
| // Pagination routines. |
| virtual bool relayoutForPagination(bool hasSpecifiedPageLogicalHeight, LayoutUnit pageLogicalHeight, LayoutStateMaintainer&); |
| |
| protected: |
| OwnPtr<FloatingObjects> m_floatingObjects; |
| OwnPtr<RenderBlockFlowRareData> m_rareData; |
| RenderLineBoxList m_lineBoxes; |
| std::unique_ptr<SimpleLineLayout::Layout> m_simpleLineLayout; |
| |
| friend class BreakingContext; |
| friend class LineBreaker; |
| friend class LineWidth; // Needs to know FloatingObject |
| }; |
| |
| RENDER_OBJECT_TYPE_CASTS(RenderBlockFlow, isRenderBlockFlow()) |
| |
| inline bool RenderElement::isRenderNamedFlowFragmentContainer() const |
| { |
| return isRenderBlockFlow() && toRenderBlockFlow(this)->renderNamedFlowFragment(); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // RenderBlockFlow_h |
